Welcome to Flyertalk and welcome to the BA Forum jacobchr, it would certainly be good if you could continue to contribute here, thank you for posting. I have my doubts this is a deliberate act of segmentation. From all we know about BA's IT, a simple bug is the more likely cause of this. But certainly we need to aware of the impact of this, moreover BA is doing this under a "best fares" module, and has a best price guarantee too. It's not their style to pick and choose their customers like this.